Contain doesn't work in react 15?

[RobinClowers]

I just upgraded to react 15.0.1, enzyme 2.3.0, and chai-enzyme 0.4.2. I have a pretty simple test:

    const component = enzymeShallow(
      <ParentComponent {...props}/>
    )

    expect(component).to.contain(ChildComponent)

I get this error:

ShallowWrapper::contains() can only be called with ReactElement (or array of them), string or number as argument.

The only odd thing is that ChildComponent is a sinon stub, but the error indicates that it never even got to the actual assertion. What am I doing wrong?

[RobinClowers]

In retrospect, this seems like a problem with Enzyme, not this lib. Feel free to close this if that's the case.

[RobinClowers]

I switched to using containsMatchingElement, which worked.